Laboratoire de physiologie de l'arbre, université Paris Diderot, 2, place Jussieu, 75005 Paris, France.
C R Biol. 2011 Dec;334(12):872-9. doi: 10.1016/j.crvi.2011.06.003. Epub 2011 Sep 15.
We examined the influence of the invasive species Ailanthus altissima (Mill.) Swingle on the understory of the Fontainebleau forest, a peri-urban forest of Paris (France), by comparing invaded versus control plots. We performed floristic inventories in fixed plots around the base of A. altissima vs native trees in different habitat types of the forest. Our findings suggest that the understory vegetation is significantly poorer and more common under A. altissima than under the other tree species and that the floristic composition is significantly different. Furthermore, the number of A. altissima root suckers growing in the plots was significantly negatively correlated with floristic richness. This effect can be attributed to both interspecific competition and allelopathic properties of A. altissima. These results give an estimate of the threat to biodiversity ascribed to A. altissima in the Fontainebleau forest.
我们通过比较入侵和对照样本来研究入侵物种臭椿（Ailanthus altissima（Mill.）Swingle）对巴黎周边森林丰特奈森林（Fontainebleau forest）林下植被的影响。我们在臭椿周围和森林不同生境类型下的本地树种固定样方中进行了植物区系编目。我们的研究结果表明，臭椿下的林下植被明显比其他树种下更稀少、更常见，且植物区系组成明显不同。此外，样方中臭椿根蘖的数量与植物丰富度呈显著负相关。这种影响可能归因于种间竞争和臭椿的化感特性。这些结果提供了丰特奈森林中臭椿对生物多样性威胁的估计。
